Ultra-compact, high performance motor controller and method...

H - Electricity – 02 – P

Patent

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H02P 7/06 (2006.01)

Patent

CA 2581191

Featured is a controller for a motor that is ultra-compact, with a power density of at least about 20 watts per cubic cm (W/cm3).The controller utilizes a common ground for power circuitry, which energizes the windings of the motor, and the signal circuitry, which controls this energization responsive to signals from one or more sensors. Also, the ground is held at a stable potential without galvanic isolation. The circuits, their components and connectors are sized and located to minimize their inductance and heat is dissipated by conduction to the controller's exterior such as by a thermally conductive and electrically insulating material (e.g., potable epoxy). The controller uses a single current sensor for plural windings and preferably a single heat sensor within the controller. The body of the controller can also function as the sole plug connector.

L'invention concerne un contrôleur pour un moteur qui est ultra-compact, présentant une densité de puissance d'au moins environ 20 watts par cm cube (W/cm 3).Le contrôleur utilise une masse commune pour des circuits d'alimentation, lesquels excitent les enroulements du moteur, ainsi que les circuits de signalisation, lesquels commandent l'excitation en réponse aux signaux d'un ou de plusieurs capteurs. Ainsi, la masse est maintenue à un potentiel stable sans isolation galvanique. Les circuits, leurs composants et connecteurs sont dimensionnés et placés de manière à réduire au minimum leur inductance et la chaleur est dissipée par conduction vers l'extérieur du contrôleur tel que par un matériau thermoconducteur et électro-isolant (par exemple, de l'époxy potable). Le contrôleur utilise un capteur de courant unique pour plusieurs enroulements et de préférence un capteur thermique unique présent dans le contrôleur. Le corps du contrôleur peut également fonctionner comme un connecteur mâle unique.

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